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1.1 root 1: /* hp.c: A HP LAN ethernet driver for linux. */
2: /*
3: Written 1993-94 by Donald Becker.
4:
5: Copyright 1993 United States Government as represented by the
6: Director, National Security Agency.
7:
8: This software may be used and distributed according to the terms
9: of the GNU Public License, incorporated herein by reference.
10:
11: The author may be reached as [email protected], or C/O
12: Center of Excellence in Space Data and Information Sciences
13: Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771
14:
15: This is a driver for the HP PC-LAN adaptors.
16:
17: Sources:
18: The Crynwr packet driver.
19: */
20:
21: static const char *version =
22: "hp.c:v1.10 9/23/94 Donald Becker ([email protected])\n";
23:
24:
25: #include <linux/module.h>
26:
27: #include <linux/kernel.h>
28: #include <linux/sched.h>
29: #include <linux/errno.h>
30: #include <linux/ioport.h>
31: #include <linux/netdevice.h>
32: #include <linux/etherdevice.h>
33:
34: #include <asm/system.h>
35: #include <asm/io.h>
36:
37: #include "8390.h"
38:
39: /* A zero-terminated list of I/O addresses to be probed. */
40: static unsigned int hppclan_portlist[] =
41: { 0x300, 0x320, 0x340, 0x280, 0x2C0, 0x200, 0x240, 0};
42:
43: #define HP_IO_EXTENT 32
44:
45: #define HP_DATAPORT 0x0c /* "Remote DMA" data port. */
46: #define HP_ID 0x07
47: #define HP_CONFIGURE 0x08 /* Configuration register. */
48: #define HP_RUN 0x01 /* 1 == Run, 0 == reset. */
49: #define HP_IRQ 0x0E /* Mask for software-configured IRQ line. */
50: #define HP_DATAON 0x10 /* Turn on dataport */
51: #define NIC_OFFSET 0x10 /* Offset the 8390 registers. */
52:
53: #define HP_START_PG 0x00 /* First page of TX buffer */
54: #define HP_8BSTOP_PG 0x80 /* Last page +1 of RX ring */
55: #define HP_16BSTOP_PG 0xFF /* Same, for 16 bit cards. */
56:
57: int hp_probe(struct device *dev);
58: int hp_probe1(struct device *dev, int ioaddr);
59:
60: static int hp_open(struct device *dev);
61: static int hp_close(struct device *dev);
62: static void hp_reset_8390(struct device *dev);
63: static void hp_get_8390_hdr(struct device *dev, struct e8390_pkt_hdr *hdr,
64: int ring_page);
65: static void hp_block_input(struct device *dev, int count,
66: struct sk_buff *skb , int ring_offset);
67: static void hp_block_output(struct device *dev, int count,
68: const unsigned char *buf, const int start_page);
69:
70: static void hp_init_card(struct device *dev);
71:
72: /* The map from IRQ number to HP_CONFIGURE register setting. */
73: /* My default is IRQ5 0 1 2 3 4 5 6 7 8 9 10 11 */
74: static char irqmap[16] = { 0, 0, 4, 6, 8,10, 0,14, 0, 4, 2,12,0,0,0,0};
75:
76:
77: /* Probe for an HP LAN adaptor.
78: Also initialize the card and fill in STATION_ADDR with the station
79: address. */
80: #ifdef HAVE_DEVLIST
81: struct netdev_entry netcard_drv =
82: {"hp", hp_probe1, HP_IO_EXTENT, hppclan_portlist};
83: #else
84:
85: int hp_probe(struct device *dev)
86: {
87: int i;
88: int base_addr = dev ? dev->base_addr : 0;
89:
90: if (base_addr > 0x1ff) /* Check a single specified location. */
91: return hp_probe1(dev, base_addr);
92: else if (base_addr != 0) /* Don't probe at all. */
93: return ENXIO;
94:
95: for (i = 0; hppclan_portlist[i]; i++) {
96: int ioaddr = hppclan_portlist[i];
97: if (check_region(ioaddr, HP_IO_EXTENT))
98: continue;
99: if (hp_probe1(dev, ioaddr) == 0)
100: return 0;
101: }
102:
103: return ENODEV;
104: }
105: #endif
106:
107: int hp_probe1(struct device *dev, int ioaddr)
108: {
109: int i, board_id, wordmode;
110: const char *name;
111: static unsigned version_printed = 0;
112:
113: /* Check for the HP physical address, 08 00 09 xx xx xx. */
114: /* This really isn't good enough: we may pick up HP LANCE boards
115: also! Avoid the lance 0x5757 signature. */
116: if (inb(ioaddr) != 0x08
117: || inb(ioaddr+1) != 0x00
118: || inb(ioaddr+2) != 0x09
119: || inb(ioaddr+14) == 0x57)
120: return ENODEV;
121:
122: /* Set up the parameters based on the board ID.
123: If you have additional mappings, please mail them to me -djb. */
124: if ((board_id = inb(ioaddr + HP_ID)) & 0x80) {
125: name = "HP27247";
126: wordmode = 1;
127: } else {
128: name = "HP27250";
129: wordmode = 0;
130: }
131:
132: /* We should have a "dev" from Space.c or the static module table. */
133: if (dev == NULL) {
134: printk("hp.c: Passed a NULL device.\n");
135: dev = init_etherdev(0, 0);
136: }
137:
138: if (ei_debug && version_printed++ == 0)
1.1.1.2 ! root 139: printk("%s", version);
1.1 root 140:
141: printk("%s: %s (ID %02x) at %#3x,", dev->name, name, board_id, ioaddr);
142:
143: for(i = 0; i < ETHER_ADDR_LEN; i++)
144: printk(" %2.2x", dev->dev_addr[i] = inb(ioaddr + i));
145:
146: /* Snarf the interrupt now. Someday this could be moved to open(). */
147: if (dev->irq < 2) {
148: int irq_16list[] = { 11, 10, 5, 3, 4, 7, 9, 0};
149: int irq_8list[] = { 7, 5, 3, 4, 9, 0};
150: int *irqp = wordmode ? irq_16list : irq_8list;
151: do {
152: int irq = *irqp;
153: if (request_irq (irq, NULL, 0, "bogus", NULL) != -EBUSY) {
154: autoirq_setup(0);
155: /* Twinkle the interrupt, and check if it's seen. */
156: outb_p(irqmap[irq] | HP_RUN, ioaddr + HP_CONFIGURE);
157: outb_p( 0x00 | HP_RUN, ioaddr + HP_CONFIGURE);
158: if (irq == autoirq_report(0) /* It's a good IRQ line! */
159: && request_irq (irq, &ei_interrupt, 0, "hp", NULL) == 0) {
160: printk(" selecting IRQ %d.\n", irq);
161: dev->irq = *irqp;
162: break;
163: }
164: }
165: } while (*++irqp);
166: if (*irqp == 0) {
167: printk(" no free IRQ lines.\n");
168: return EBUSY;
169: }
170: } else {
171: if (dev->irq == 2)
172: dev->irq = 9;
173: if (request_irq(dev->irq, ei_interrupt, 0, "hp", NULL)) {
174: printk (" unable to get IRQ %d.\n", dev->irq);
175: return EBUSY;
176: }
177: }
178:
179: /* Allocate dev->priv and fill in 8390 specific dev fields. */
180: if (ethdev_init(dev)) {
181: printk (" unable to get memory for dev->priv.\n");
182: free_irq(dev->irq, NULL);
183: return -ENOMEM;
184: }
185:
186: /* Grab the region so we can find another board if something fails. */
187: request_region(ioaddr, HP_IO_EXTENT,"hp");
188:
189: /* Set the base address to point to the NIC, not the "real" base! */
190: dev->base_addr = ioaddr + NIC_OFFSET;
191: dev->open = &hp_open;
192: dev->stop = &hp_close;
193:
194: ei_status.name = name;
195: ei_status.word16 = wordmode;
196: ei_status.tx_start_page = HP_START_PG;
197: ei_status.rx_start_page = HP_START_PG + TX_PAGES;
198: ei_status.stop_page = wordmode ? HP_16BSTOP_PG : HP_8BSTOP_PG;
199:
200: ei_status.reset_8390 = &hp_reset_8390;
201: ei_status.get_8390_hdr = &hp_get_8390_hdr;
202: ei_status.block_input = &hp_block_input;
203: ei_status.block_output = &hp_block_output;
204: hp_init_card(dev);
205:
206: return 0;
207: }
208:
209: static int
210: hp_open(struct device *dev)
211: {
212: ei_open(dev);
213: MOD_INC_USE_COUNT;
214: return 0;
215: }
216:
217: static int
218: hp_close(struct device *dev)
219: {
220: ei_close(dev);
221: MOD_DEC_USE_COUNT;
222: return 0;
223: }
224:
225: static void
226: hp_reset_8390(struct device *dev)
227: {
228: int hp_base = dev->base_addr - NIC_OFFSET;
229: int saved_config = inb_p(hp_base + HP_CONFIGURE);
230:
231: if (ei_debug > 1) printk("resetting the 8390 time=%ld...", jiffies);
232: outb_p(0x00, hp_base + HP_CONFIGURE);
233: ei_status.txing = 0;
234: /* Pause just a few cycles for the hardware reset to take place. */
235: SLOW_DOWN_IO;
236: SLOW_DOWN_IO;
237:
238: outb_p(saved_config, hp_base + HP_CONFIGURE);
239: SLOW_DOWN_IO; SLOW_DOWN_IO;
240:
241: if ((inb_p(hp_base+NIC_OFFSET+EN0_ISR) & ENISR_RESET) == 0)
242: printk("%s: hp_reset_8390() did not complete.\n", dev->name);
243:
244: if (ei_debug > 1) printk("8390 reset done (%ld).", jiffies);
245: return;
246: }
247:
248: static void
249: hp_get_8390_hdr(struct device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
250: {
251: int nic_base = dev->base_addr;
252: int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
253:
254: outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
255: outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base);
256: outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
257: outb_p(0, nic_base + EN0_RCNTHI);
258: outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
259: outb_p(ring_page, nic_base + EN0_RSARHI);
260: outb_p(E8390_RREAD+E8390_START, nic_base);
261:
262: if (ei_status.word16)
263: insw(nic_base - NIC_OFFSET + HP_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
264: else
265: insb(nic_base - NIC_OFFSET + HP_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
266:
267: outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
268: }
269:
270: /* Block input and output, similar to the Crynwr packet driver. If you are
271: porting to a new ethercard look at the packet driver source for hints.
272: The HP LAN doesn't use shared memory -- we put the packet
273: out through the "remote DMA" dataport. */
274:
275: static void
276: hp_block_input(struct device *dev, int count, struct sk_buff *skb, int ring_offset)
277: {
278: int nic_base = dev->base_addr;
279: int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
280: int xfer_count = count;
281: char *buf = skb->data;
282:
283: outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
284: outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base);
285: outb_p(count & 0xff, nic_base + EN0_RCNTLO);
286: outb_p(count >> 8, nic_base + EN0_RCNTHI);
287: outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
288: outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
289: outb_p(E8390_RREAD+E8390_START, nic_base);
290: if (ei_status.word16) {
291: insw(nic_base - NIC_OFFSET + HP_DATAPORT,buf,count>>1);
292: if (count & 0x01)
293: buf[count-1] = inb(nic_base - NIC_OFFSET + HP_DATAPORT), xfer_count++;
294: } else {
295: insb(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count);
296: }
297: /* This is for the ALPHA version only, remove for later releases. */
298: if (ei_debug > 0) { /* DMA termination address check... */
299: int high = inb_p(nic_base + EN0_RSARHI);
300: int low = inb_p(nic_base + EN0_RSARLO);
301: int addr = (high << 8) + low;
302: /* Check only the lower 8 bits so we can ignore ring wrap. */
303: if (((ring_offset + xfer_count) & 0xff) != (addr & 0xff))
304: printk("%s: RX transfer address mismatch, %#4.4x vs. %#4.4x (actual).\n",
305: dev->name, ring_offset + xfer_count, addr);
306: }
307: outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
308: }
309:
310: static void
311: hp_block_output(struct device *dev, int count,
312: const unsigned char *buf, const int start_page)
313: {
314: int nic_base = dev->base_addr;
315: int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
316:
317: outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
318: /* Round the count up for word writes. Do we need to do this?
319: What effect will an odd byte count have on the 8390?
320: I should check someday. */
321: if (ei_status.word16 && (count & 0x01))
322: count++;
323: /* We should already be in page 0, but to be safe... */
324: outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base);
325:
326: #ifdef NE8390_RW_BUGFIX
327: /* Handle the read-before-write bug the same way as the
328: Crynwr packet driver -- the NatSemi method doesn't work. */
329: outb_p(0x42, nic_base + EN0_RCNTLO);
330: outb_p(0, nic_base + EN0_RCNTHI);
331: outb_p(0xff, nic_base + EN0_RSARLO);
332: outb_p(0x00, nic_base + EN0_RSARHI);
333: #define NE_CMD 0x00
334: outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
335: /* Make certain that the dummy read has occurred. */
336: inb_p(0x61);
337: inb_p(0x61);
338: #endif
339:
340: outb_p(count & 0xff, nic_base + EN0_RCNTLO);
341: outb_p(count >> 8, nic_base + EN0_RCNTHI);
342: outb_p(0x00, nic_base + EN0_RSARLO);
343: outb_p(start_page, nic_base + EN0_RSARHI);
344:
345: outb_p(E8390_RWRITE+E8390_START, nic_base);
346: if (ei_status.word16) {
347: /* Use the 'rep' sequence for 16 bit boards. */
348: outsw(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count>>1);
349: } else {
350: outsb(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count);
351: }
352:
353: /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here -- it's broken! */
354:
355: /* This is for the ALPHA version only, remove for later releases. */
356: if (ei_debug > 0) { /* DMA termination address check... */
357: int high = inb_p(nic_base + EN0_RSARHI);
358: int low = inb_p(nic_base + EN0_RSARLO);
359: int addr = (high << 8) + low;
360: if ((start_page << 8) + count != addr)
361: printk("%s: TX Transfer address mismatch, %#4.4x vs. %#4.4x.\n",
362: dev->name, (start_page << 8) + count, addr);
363: }
364: outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
365: return;
366: }
367:
368: /* This function resets the ethercard if something screws up. */
369: static void
370: hp_init_card(struct device *dev)
371: {
372: int irq = dev->irq;
373: NS8390_init(dev, 0);
374: outb_p(irqmap[irq&0x0f] | HP_RUN,
375: dev->base_addr - NIC_OFFSET + HP_CONFIGURE);
376: return;
377: }
378:
379: #ifdef MODULE
380: #define MAX_HP_CARDS 4 /* Max number of HP cards per module */
381: #define NAMELEN 8 /* # of chars for storing dev->name */
382: static char namelist[NAMELEN * MAX_HP_CARDS] = { 0, };
383: static struct device dev_hp[MAX_HP_CARDS] = {
384: {
385: NULL, /* assign a chunk of namelist[] below */
386: 0, 0, 0, 0,
387: 0, 0,
388: 0, 0, 0, NULL, NULL
389: },
390: };
391:
392: static int io[MAX_HP_CARDS] = { 0, };
393: static int irq[MAX_HP_CARDS] = { 0, };
394:
395: /* This is set up so that only a single autoprobe takes place per call.
396: ISA device autoprobes on a running machine are not recommended. */
397: int
398: init_module(void)
399: {
400: int this_dev, found = 0;
401:
402: for (this_dev = 0; this_dev < MAX_HP_CARDS; this_dev++) {
403: struct device *dev = &dev_hp[this_dev];
404: dev->name = namelist+(NAMELEN*this_dev);
405: dev->irq = irq[this_dev];
406: dev->base_addr = io[this_dev];
407: dev->init = hp_probe;
408: if (io[this_dev] == 0) {
409: if (this_dev != 0) break; /* only autoprobe 1st one */
410: printk(KERN_NOTICE "hp.c: Presently autoprobing (not recommended) for a single card.\n");
411: }
412: if (register_netdev(dev) != 0) {
413: printk(KERN_WARNING "hp.c: No HP card found (i/o = 0x%x).\n", io[this_dev]);
414: if (found != 0) return 0; /* Got at least one. */
415: return -ENXIO;
416: }
417: found++;
418: }
419:
420: return 0;
421: }
422:
423: void
424: cleanup_module(void)
425: {
426: int this_dev;
427:
428: for (this_dev = 0; this_dev < MAX_HP_CARDS; this_dev++) {
429: struct device *dev = &dev_hp[this_dev];
430: if (dev->priv != NULL) {
431: int ioaddr = dev->base_addr - NIC_OFFSET;
432: kfree(dev->priv);
433: dev->priv = NULL;
434: free_irq(dev->irq, NULL);
435: irq2dev_map[dev->irq] = NULL;
436: release_region(ioaddr, HP_IO_EXTENT);
437: unregister_netdev(dev);
438: }
439: }
440: }
441: #endif /* MODULE */
442:
443: /*
444: * Local variables:
445: * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c hp.c"
446: * version-control: t
447: * kept-new-versions: 5
448: * tab-width: 4
449: * c-indent-level: 4
450: * End:
451: */
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